Related Clues:
- Hospital to manage with revolutionary procedure for a time
- Development of one billion years
- Aeon
- It's hard to get by when coming back for an extended period
- Regularly bemoan age
- Energy needed, working for a long period
- Manage to be upset with husband for a long time
- Bob up to conceal church leader's age?
- Single European taking top position for a long time
- Long time no see — finally turned up
- In space, one thousand million years
- Period too long to measure
- Historical time period
- Ages and ages, collectively
- Policeman turning up in what is a remarkable time